@Article{ 
  GenSar16,
  author = { Gentili, Graziano and Sarfatti, Giulia },
  title = { The Mittag-Leffler Theorem for regular functions of a quaternionic
  variable },
  journal = { New York J. Math. },
  year = { 2017 },
  volume = { 23 },
  pages = { 583-592 },
  URL = { https://gecogedi.dimai.unifi.it/paper/129/ },
  note = { cvgmt preprint}
}